an empty propane tank dropped from a hot air balloon hits the ground with a speed of 143.8 m/s. from what height was the tank re
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Answer
given,
Echo time = t = 1000 s
speed = ?
a) speed of electromagnetic wave
wave travels Venus two time
d = 1.5 x 10¹¹ m
b) now, echo time
t = 5 x 10⁻⁷ s